To avoid these ads, REGISTER NOW!

Air Compressors in tandem single inlet.

wasit

New member
Joined
Apr 29, 2024
Messages
1
I have a CNC plasma cutter that requires 105 to 125 psi air pressure to operate correctly. When I first installed it, I jacked the psi on my main air compressor up to 125 psi. This was too much for the rest of the shop as it had always been 80 to 115 psi range.
I have a refrigerated moisture removal unit after the main compressor.
I had installed a secondary air compressor close to the plasma cutter so I could use the existing dried air to feed the plasma. In order to get it to run, because the supplied shop air was too much pressure and the pump just stalled when trying to start, I installed a Asco valve to start and stop flow, a regulator to cut the pressure feeding a/c #2 down to 30 psi (normal air pressure is 29.9 or there about). These two items were before the 2nd a/c. There are 3 one way flow control valves in there too.

The issue I am having now is that my regulation system is choking the flow, just wondering if someone else had an issue like this and what was their solution?
 
To avoid these ads, REGISTER NOW!

u3b3rg33k

Well-known member
Joined
Dec 18, 2017
Messages
4,068
are you saying you have air compressors in series? or something else?

I have upgraded to better regulators for some machines, Wilkerson B18 series solved a bunch of issues for me.
 
To avoid these ads, REGISTER NOW!

MacMcMacmac

Well-known member
Joined
Oct 21, 2014
Messages
1,604
Location
canada
They are in series. The second unit uses pre-compressed dried air into the inlet. It's acting as a booster compressor. I think it would have been a lot easier to keep the main compressor at 125 and regulate the pressure to the rest of the shop.

I think you have confused 29" Hg absolute (1 atmosphere @ sea level) with 30psig at the inlet of your second compressor.
 
Last edited:

Sumboodie

Well-known member
Joined
Mar 20, 2021
Messages
10,955
Location
AK
Why are the compressors set so low?
Most shop air is 150-175psi and regulated down near the point of use.

I feed my plasma cutter 150psi. Regulator on it set to ~90
 

whateg01

Well-known member
Joined
Mar 13, 2006
Messages
11,818
Location
doo dah, kansas, usa
Why are the compressors set so low?
Most shop air is 150-175psi and regulated down near the point of use.

I feed my plasma cutter 150psi. Regulator on it set to ~90
Most? My compressor shut off is 135 and it's regulated down to about 100. Not everybody runs a 175 psig compressor
 
To avoid these ads, REGISTER NOW!
Top Bottom